698 results about "Optical fiber coupling" patented technology

The invention relates to the technical field of silicon waveguide and optical fiber coupling, and particularly provides an AI-based silicon waveguide-optical fiber mode field self-alignment coupling method and system, and the method comprises the steps: monitoring the strain distribution of a chip in real time through an integrated distributed fiber bragg grating array, and obtaining the light field intensity distribution of a coupling region through cooperation with a near-field optical probe array; constructing a deep space-time convolutional network, and generating a deformation compensation vector and a waveguide reconstruction parameter by an output layer; a nanofluid channel is integrated on the side wall of the waveguide, and the refractive index of liquid is adjusted through an electrowetting effect to realize dynamic broadening of a mode field; and the electrostatic driving micro-beam embedded below the waveguide adjusts the spatial pose of the waveguide according to an instruction of an output layer of the depth space-time convolutional network. The system comprises a light field intensity acquisition module, a convolutional network construction module and a spatial pose adjustment module. According to the method, real-time analysis and prediction are performed, so that system parameters are actively adjusted, and alignment precision and stability are improved.

The invention provides an optical chip, an optical chip manufacturing method, an optical signal transmission method and an optical module.The optical chip comprises an optical port coupled with an optical fiber and used for receiving a first optical signal from the optical fiber, and the first optical signal comprises a component in a transverse magnetic (TM) mode; the PSR is used for performing first processing on the first optical signal to generate a second optical signal, the second optical signal is in a transverse electric TE mode, and the second optical signal is a single-channel multi-wavelength optical signal; the at least one wavelength demultiplexer DeMux is used for performing second processing on the second optical signal to generate a third optical signal, and the third optical signal is a multi-channel single-wavelength optical signal; the photoelectric detector array is used for converting the third optical signal into an electric signal; wherein the optical port, the PSR, and the at least one DeMux are made of silicon nitride SiN.

The invention discloses a method for calibrating multiple channels of a photon calculation chip, which comprises the following steps of: inputting same calibration optical signals to a calculation module channel by channel, and acquiring a calibration output value of each channel; selecting a certain channel as a reference channel, and taking a calibration output value of the reference channel as a reference calibration output value; the other channels are used as channels to be calibrated; and the input optical signal of the calculation module of each to-be-calibrated channel is adjusted according to the external control electric signal, so that the calibration output value of each to-be-calibrated channel of the calculation module is the reference calibration output value under the condition that the light source module inputs the calibration optical signal. Original errors caused by manufacturing process errors and optical fiber coupling are adjusted through input optical signals, so that final output structures are consistent. According to the invention, the calibration module is arranged on hardware to adjust the optical signal, and a calibration coefficient does not need to be added into the calculation module, so that the burden of the calculation module is reduced.

A neurosurgery system for probing brain tissue of a patient for tumorous tissue. The system including a suction tool, an excitation source, an optical instrument, and a controller. The suction tool including a suction cannula defining a lumen, an optical fiber configured to transmit fluorescence emitted by the brain tissue; and an indicator configured to selectively emit visible light. An excitation source is configured to emit an excitation light having a wavelength to induce the fluorescence in the tumorous tissue. The optical instrument is coupled to the optical fiber. The optical instrument configured to convert the fluorescence emitted by the brain tissue and transmitted by the optical and configured to determine that the brain tissue is tumorous based on the electrical signal and activate the indicator based on the determination.

The invention discloses silicon optical wafer testing equipment and an optical fiber pose adjusting mechanism, method and system thereof. The optical fiber pose adjusting mechanism comprises a camera assembly and a deflection optical path assembly. The probe station is used for bearing a silicon optical wafer; an optical fiber coupling module; when the driving assembly drives the silicon optical wafer to be located in the imaging view field of the camera assembly, the camera assembly is adjusted to enable the coordinate system to be parallel to the cutting channel of the silicon optical wafer; when the driving assembly drives the deflection optical path assembly to move into an imaging view field of the camera assembly, the camera assembly collects lateral images of the end part of the optical fiber in at least two different directions through the deflection optical path assembly; and the optical fiber coupling module is used for performing pose adjustment on the end part of the optical fiber according to the lateral image and the direction of the coordinate system of the camera assembly, so that the end part of the optical fiber is preliminarily aligned with the silicon optical wafer. The operation difficulty and the equipment structure of alignment coupling between the optical fiber end part and the silicon optical waveguide are simplified, and the equipment cost is reduced.

The invention relates to an optical fiber coupling dynamic interferometer based on arrayed waveguide grating light splitting. A luminous source and an arrayed waveguide grating of the optical fiber coupling dynamic interferometer are arranged on a motion module. The light emitting source is connected to the input port of the array waveguide grating through an optical fiber, and through the movement module, any one of the multiple output ports of the array waveguide grating is in butt joint with the optical fiber connected to the incident end of the collimation structure. A half-wave plate and a beam splitter prism of the imaging element group are sequentially arranged on an emergent light path of the emergent end of the collimation structure, and the beam splitter prism is used for splitting a light beam passing through the half-wave plate into a reference light beam transmitted along a first light path and a measurement light beam transmitted along a second light path. And the reflecting mirror of the imaging element group reflects the reference light beam back to the beam splitting prism. And the to-be-measured surface reflects the measurement light beam back to the beam splitter prism. The reference beam and the measurement beam reflected back to the beam splitter prism interfere with each other and are imaged on the target surface of the camera. Accurate measurement of the wavefront image of the surface to be measured is realized.

The invention discloses semiconductor optical fiber coupling equipment, and relates to the technical field of optical fiber coupling, the equipment comprises a fixing box, a connecting pipe is installed at the center position of one end of the fixing box, and a first fixing block is installed on the side, close to the center position of the fixing box, in the connecting pipe; a butt joint penetrating hole is formed in the center of the first fixing block, a first optical fiber core is installed in the butt joint penetrating hole, a semiconductor laser is installed in the fixing box, the output end of the semiconductor laser right faces the input end of the first optical fiber core, and a lens coupling mechanism is arranged between the semiconductor laser and the connecting pipe. The wide parallel light is changed into the narrow parallel light through the lens group formed by the convex lens and the concave lens, and the final laser width is the same as the section width of the first optical fiber core after the change of the plurality of lens groups, so that the laser emitted by the semiconductor laser is irradiated into the first optical fiber core in parallel, and the optical fiber coupling efficiency is improved.

The invention discloses a hybrid integrated optical fiber coupling superconducting nanowire single-photon detector and an implementation method. The detector is directly integrated on the end face of an optical fiber, each layer of superconducting nanowire single-photon detector comprises a superconducting nanowire, electrodes at the two ends and a lower-layer optical cavity, the center of the nanowire is aligned with a fiber core of the optical fiber, and the uppermost layer is integrated with the optical cavity and a reflector; wherein the projections of the nanowires of the same detector are parallel to each other, the nanowires of different detectors are mutually orthogonal in pairs, and the polarization-insensitive superconducting nanowire single-photon detector is obtained after packaging. Or the nanowire projections of each layer of detector are parallel to each other, and the superconductive nanowire single-photon detector with high absorptivity is obtained after packaging. Or all layers of detectors and reflectors are integrated into optical cavities with different thicknesses, and the wide-spectrum superconducting nanowire single-photon detector with multiple central wavelengths is obtained after packaging. According to the invention, a high-performance and multifunctional superconducting nanowire single-photon detector is realized through a hybrid integration process.

Apparatus and method for detachably connecting at least one optical fiber of a detachable photonic plug to a photonic integrated circuit (PIC). The detachable photonic plug comprises: a detachable plug die; an optically transparent spacer coupled to the detachable plug die; and at least one optical fiber held between the detachable plug die and the spacer. On the PIC side, apparatus includes a receptacle adapted to receive a detachable photonic plug adapted to couple at least one optical fiber to a photonic integrated circuit (PIC); and a photonic bump of the PIC, the photonic bump having a least one fine alignment feature. The method comprises permanently mounting a receptacle over at least a portion of the PIC; after completion of mounting, inserting the detachable photonic plug into the receptacle; and after the detachable photonic plug is inserted in the receptacle, securing the detachable photonic plug in the receptacle.

The invention relates to the technical field of optical fiber coupling, and discloses semiconductor laser lens coupling equipment which comprises a base, a laser and an optical fiber placement seat are arranged on the two sides of the top of the base respectively, a moving mechanism is arranged in the middle of the top of the base, and the moving mechanism comprises a moving block and a moving seat; and the dumping storage assembly is arranged at the top of the moving mechanism. By arranging a dumping storage assembly and a moving mechanism at the bottom of a lens body, when the lens body does not need to be used, a motor is used as a drive to drive a lead screw to rotate, so that the lens body on a moving block is driven to move, a square plate below the lens body is moved to the position in contact with a push plate, and the push plate is used for pushing the square plate to rotate; the rotating base on the connecting shaft is driven to rotate, the lens body on the rotating base is driven to rotate, the lens body is horizontally placed on the top of the moving base, collision of external movement to the lens body is avoided, and the protection effect is achieved.

The invention provides a three-axis modulator chip structure and a three-axis fiber-optic gyroscope. The three-axis modulator chip structure comprises an electro-optical modulation chip, a first optical fiber and a second optical fiber, the input fiber is connected with the side of the chip. The input waveguide is embedded in the top surface of the chip, and the first end is coupled with the input fiber; a main port of the one-to-three coupler is coupled with the second end of the input waveguide; first branch ports of the three first one-to-two couplers are respectively coupled with three branch ports of the one-to-three coupler, second branch ports of the three first one-to-two couplers are respectively coupled with the three photoelectric detectors, and total ports of the three first one-to-two couplers are respectively coupled with total ports of the three second one-to-two couplers; each group of Y waveguide modulators comprises a Y waveguide and a modulation electrode, and first ends of two branch arms of the Y waveguide are coupled with two branch ports of the second one-to-two coupler; each output optical fiber group comprises two output optical fibers which are respectively coupled with the second ends of the two branch arms of the Y waveguide; the sealing cover covers the top surface of the chip. Welding is not needed, the assembling difficulty is reduced, and the overall size is reduced.

A coupling agent for deployment around an optical fiber in a subsurface wellbore, the coupling agent including a curable or non-curable compound that can form into a reversible polymerized gel state located around at least a portion of the optical fiber and there is a gel-optical fiber interface strain gradient that is greater than a wellbore fluid-optical fiber strain gradient. A method of deploying an optical fiber in a fluid path of a subsurface wellbore and introducing a coupling agent in the fluid path.

The invention provides a packaging structure, an optical module and an optical system, the packaging structure comprises an optical fiber unit and a chip unit, the chip unit comprises a photon chip and a chip cover plate, the photon chip is buckled with the chip cover plate, a spot size converter is arranged in the photon chip, and the spot size converter is composed of a cantilever beam waveguide and a first groove; the optical fiber unit comprises an optical fiber, a bottom plate and an optical fiber cover plate bottom plate; the waveguide is coupled with the optical fiber; wherein a first bonding part is arranged between the chip cover plate and the bottom plate, and a second bonding part is arranged between the photon chip and the optical fiber cover plate; or a first bonding part is arranged between the chip cover plate and the optical fiber cover plate, and a second bonding part is arranged between the photon chip and the bottom plate. In the packaging structure, a chip cover plate is arranged on a photon chip to form a chip unit, so that the bonding area between the chip unit and an optical fiber array is increased, the mechanical stability of the packaging structure is improved, and alignment of waveguides in the photon chip and optical fibers in the optical fiber array is realized.

According to the single-fiber coupling type double-beam miniaturized high-sensitivity atom magnetometer device, pumping laser and detection laser are orthogonally coupled into a single polarization maintaining fiber through a polarization beam splitter, and miniaturization of a light source light path is achieved. Besides, the polarization maintaining optical fiber and the polarization beam splitter are adopted to combine and decouple the light beams, so that the problems that the miniaturization difficulty of the magnetometer probe is increased due to light guide of multiple collimating heads and extra noise is introduced by multiple optical fibers are avoided, and high sensitivity is realized in a small detection volume; and a great promotion effect is achieved in related detection application of high-density multi-atom magnetometer array type heart and brain magnetism.

The invention belongs to the technical field of agricultural light supplement, and particularly relates to an agricultural light supplement lamp system and method based on optical fiber transmission and fluorescence conversion. Efficient light distribution from a single light source to multiple application terminals is achieved, and the proportion of blue light to red light can be flexibly adjusted according to the photosynthesis requirements of crops. In addition, the optical shaping system arranged behind the application tail end ensures that the light can be accurately irradiated on the target crop, so that the light utilization rate and the energy conversion efficiency are greatly improved. Through the technical innovation, the wiring design is simplified, the complexity and the cost of the system are reduced, and the effectiveness of photosynthesis and the growth quality of crops are remarkably improved.

The invention relates to the technical field of coupling alignment of single-mode optical fibers, in particular to an optical fiber coupling alignment method and system based on wavefront aberration and a sensitivity matrix. The system comprises an optical measurement module, a processing and control module and a multi-axis precision adjustment platform, and the alignment method comprises the steps that firstly, an interference fringe image is obtained and processed through an interference light path, continuous wavefront is recovered through Fourier transform and phase unwrapping, and a Zernike coefficient for quantizing wavefront distortion is obtained through Zernike polynomial fitting. A sensitivity matrix representing the linear relation between the degree-of-freedom adjustment amount and Zernike coefficient changes is established and serves as a physical guide item to introduce a speed updating formula of a particle swarm optimization algorithm, an SG-PSO algorithm is formed, a particle swarm is guided to conduct directional intelligent search and rapidly output the optimal adjustment amount, and finally a multi-axis precision adjustment platform is driven to complete alignment. According to the method, optimization of wavefront sensing and physical model guiding is effectively fused, and the convergence speed, the alignment precision and the global search capability are remarkably improved.

The endoscope light source lighting device comprises a light source assembly, a light source collimation module, a light combination assembly and an optical fiber coupling module, after light beams emitted by the light source assembly are collimated by the light source collimation module, the light beams are combined through the light combination assembly, and finally the light beams are coupled with optical fibers through the optical fiber coupling module. And one or more paths of light beams of the light source assembly are controlled to be coupled and output, illumination output in multiple illumination modes is achieved, and the multiple illumination modes comprise a white light illumination mode, a multi-narrow-band light illumination mode, a near-infrared light illumination mode and a composite light illumination mode. According to the multi-channel lighting mode, narrow-band or broadband spectrum composite lighting is achieved, the problems that in the prior art, the light emitting mode is limited, and high-color-rendering-index lighting light with continuous spectrums cannot be output in a white light lighting mode are solved, and the problems that original narrow-band lighting is low in efficiency, inflexible and poor in lighting effect are solved. And the requirement of flexible switching between narrow-band illumination and wide-band illumination cannot be met, and the illumination requirement of a detected part in clinical diagnosis and treatment is met.

The invention provides a packaging structure, an optical module and an optical system. The packaging structure comprises a photon chip, an optical fiber array and a substrate. Wherein the photon chip is internally provided with a spot size converter, and the spot size converter is composed of a cantilever beam waveguide and a first groove; the optical fiber array comprises optical fibers, a bottom plate and a cover plate, the bottom plate comprises a second groove, the second groove is used for accommodating the optical fibers, and the cover plate is buckled with the bottom plate; wherein the photon chip is arranged on the upper surface of the substrate, the bottom plate or the cover plate is arranged on the upper surface of the substrate, and the cantilever beam waveguide is in coupling connection with the optical fiber. In the packaging structure, the photon chip and the optical fiber array are arranged on the upper surface of the substrate together, and an additional supporting piece is avoided, so that the mechanical stability of the packaging structure can be ensured, the change of stress near the cantilever beam waveguide caused by temperature change, displacement, external force application and the like in the packaging structure is reduced, and low-stress packaging is realized.

The invention discloses a fiber optic spectrometer for film thickness measurement. The fiber optic spectrometer comprises a control and data processing module, a detection module, a light source module and a light splitting module, the optical fiber coupling module couples wide-spectrum light of the light source module and then guides the light to the light splitting module; the light splitting module adopts a cross-type Czerny-Turner light path structure, and performs collimation, dispersion and focusing processing on light beams in sequence; the detection module is used for receiving the optical signal processed by the light splitting module and forming an interference pattern; and the control and data processing module is used for driving acquisition, completing pixel-wavelength calibration and calculating the film thickness based on an acquired interference pattern. According to the optical fiber spectrometer measurement method for film thickness measurement, the problem of low accuracy of real-time film thickness detection in the prior art is solved.

An assembly for coupling optical fibers to photonic ports on a surface of a photonic integrated circuits includes optical components for directing optical signals between a fiber array unit and the PIC, the optical components including a pair of lens arrays and a polarizing beam splitter. Non-polarization maintaining fibers may be used with the assembly.

A device includes a die stack including a first die including a quantum circuit and a second die including an electronic circuit. The second die and the first die face each other. A coupler is bonded to a first surface of the first die, an optical fiber is coupled to the coupler for coupling light from the optical fiber to the quantum circuit.

The invention discloses an anti-resonance hollow-core waveguide photo-thermal spectrum gas sensor, and relates to an optical gas sensor. The laser comprises pump laser (1), detection laser (2), an input optical fiber (3), a hollow-core anti-resonance optical fiber (4), an output optical fiber (5) and a photoelectric detector (6), the pump laser (1) and the detection laser (2) are combined through a coupler and are coupled to an air core of the hollow-core anti-resonance optical fiber (4) through the input optical fiber (3); the input optical fiber (3), the hollow-core anti-resonance optical fiber (4), the output optical fiber (5) and the photoelectric detector (6) are connected in sequence; and the hollow-core anti-resonance optical fiber (4) comprises a waveguide gas chamber (4-0), a gas inlet (4-1) and a gas outlet (4-2). The optical phase demodulation is realized by utilizing an anti-resonance reflected light waveguide mechanism, an external interference phase demodulation structure is not needed, the system is simple, the cost is low, and the response speed is high.

The invention relates to the technical field of photoelectric co-packaging, in particular to an optical chip optical fiber coupling packaging framework and process for photoelectric co-packaging. In the optical chip and adapter plate vertical mounting system, n + 2 continuous V-shaped grooves are etched in the position, corresponding to an end face coupler, of the bottom of an adapter plate, the two V-shaped grooves in the two sides are used for arranging limiting optical fibers, the n V-shaped grooves in the middle are used for containing and guiding optical fibers, and n is larger than or equal to 1; passive alignment of coupling of the optical fiber and the optical chip, high process compatibility and high mechanical stability are achieved. According to the invention, the optical chip does not need to be installed at the edge of the adapter plate of the photoelectric co-packaging system any more, the feasibility of vertical stacking is greatly expanded, a solution is provided for the installation of the optical bridge chip in the three-dimensional stacked photoelectric co-packaging system, and a more compact structure becomes possible under the condition of using optical fiber edge coupling.

The invention belongs to the technical field of spectrum detection, and particularly relates to a light LIBS (laser-induced breakdown spectroscopy) online detection device and method capable of automatically focusing, and the device sequentially comprises a photoelectric switch, a pre-detection system, a controller, a delayer, a pulse laser, a reflector, a zooming unit, an ellipsoidal reflector, a displacement adjusting table and a transmission diaphragm according to a control logic and a light propagation path, an optical fiber coupling unit, a spectrometer and a signal intensity detector. According to the telecentric lens imaging pre-detection system, zooming can be easily achieved in the mode that the zoom lens and the displacement adjusting table drive the ellipsoidal reflector and the optical fiber coupling unit to move synchronously, the telecentric lens imaging pre-detection system can adapt to objects of different heights and forms, the problem that the motion load is large in the zooming process is solved, light weight is achieved, and the imaging precision is improved through the telecentric lens imaging pre-detection system. The focusing range can be judged in advance without changing from the maximum focusing range to the minimum focusing range, so that the detection and analysis efficiency is improved.

The utility model discloses silicon optical wafer test equipment. The silicon optical wafer test equipment comprises a camera assembly, a deflection optical path assembly, a probe station and an optical fiber coupling module, the driving assembly is used for driving the probe station and the deflection optical path assembly to move to the lower part of the camera assembly and the optical fiber end part of the optical fiber array in a mutual switching manner; the optical fiber coupling module is used for clamping the optical fiber end part of the optical fiber array; when the probe station moves to the position below the camera assembly, a cross cursor of a camera of the camera assembly is adjusted to be parallel to a cutting channel of the silicon optical wafer; when the deflection light path assembly moves into the imaging view field of the camera assembly, the camera assembly is used for collecting a first lateral image and a second lateral image through the deflection light path assembly and collecting a vertical image; and adjusting the end part of the optical fiber by using an optical fiber coupling module according to the image, so that the end part of the optical fiber and the optical waveguide are aligned and coupled. According to the application, the operation difficulty and the equipment structure for realizing alignment coupling between the optical fiber end part and the silicon optical waveguide are simplified, and the equipment cost is reduced.

The invention relates to an optical fiber coupling type focusable laser cutting device. According to the device, a laser transmitter transmits laser through an input optical fiber; the laser receiving module comprises a mounting seat, an optical fiber base, a transmission mechanism and a focusing mechanism, the focusing mechanism drives the optical fiber base to move in the axial direction through the transmission mechanism, and motor-free focusing in the nuclear radiation environment is achieved; the laser conduction module comprises a parabolic reflector for collimating and focusing the laser; according to the laser cutting device, the focusing technology depending on a motor in the prior art is converted into full-mechanical transmission focusing design, the failure risk of electronic elements such as the motor in the radiation environment is avoided, and through cooperation of the focusing mechanism, the transmission mechanism and the limiting pin, the laser cutting efficiency is improved. The high-precision and high-reliability focusing function is achieved, and the laser cutting device which is good in radiation resistance, high in long-term operation stability and long in service life is achieved in the nuclear radiation environment.

The invention discloses an optical fiber coupling real-time correction method in a single-mode and multi-mode optical fiber endoscopic imaging system, which comprises the following steps of: firstly, manually adjusting reflectors M1 and M2 to an optimal multi-mode optical fiber coupling state, acquiring images of light spots at the near end and the far end of a laser beam in the state by using a CCD (charge coupled device) 1 and a CCD 2, and calculating the position of a central coordinate of the images; and collecting a speckle image formed by the light spot through the scattering medium by using a CCD3 (charge coupled device 3). The system monitors the center coordinates of near-end and far-end light spots at the current moment and the correlation coefficient of the current speckle image and the collimation state image in real time. The piezoelectric mirror bracket is fed back and adjusted in real time through the center coordinates of the two spot light spots and the correlation coefficient of the speckles, so that the correlation coefficient of the speckles is kept above a set threshold value, and automatic calibration of light beams is achieved. On the basis of the traditional thinking that two points determine one straight line, the correlation coefficient of using speckles is increased, the alignment precision is improved, and the method has certain practicability and application prospects.

A photonic system includes an optical coupling interface for an optical fiber disposed on a first surface of a support material and a PIC die / chip disposed on a second surface of the support material that is opposite from the first surface of the support material. The PIC die / chip includes an oxide stack, where a portion of the oxide stack is configured as an optical reflector structure that includes a reflecting surface configured to direct a light beam conveyed from an optical waveguide within the PIC die / chip from a first direction of travel to a second direction of travel directed toward the second surface of the support material and toward the optical coupling interface for the optical fiber disposed on the first surface of the support material. The light beam travels through the optical reflector structure and through the support material to reach the optical coupling interface for the optical fiber.

A system for optical cooling comprises a substrate and a first waveguide supported by the substrate, with the first waveguide configured to provide optical cooling by fluorescence up-conversion. A first optical fiber is coupled to the first waveguide, with the first optical fiber configured to deliver cooling light to the first waveguide. A second waveguide is supported by the substrate, with the second waveguide adjacent to or coincident with the first waveguide. The interaction of the cooling light with the first waveguide produces a zone of local optical refrigeration based on the fluorescence up-conversion, such that the second waveguide is optically cooled by physical proximity to the first waveguide.